CHEMICAL REACTION ENGINEERING QUIZ

Specific rate constant for a second order reaction

Both B and C

Depends on the nature of the reactants

Is independent of temperature

Varies with temperature

TRUE ANSWER : ?
YOUR ANSWER : ?

The conversion in a mixed reactor/accomplishing a reaction A 3R is 50% when gaseous reactant 'A' is introduced at the rate of 1 litre/second and the leaving flow rate is 2 litres/second. The holding time for this operation is __________ second.

1

2

0.5

3

TRUE ANSWER : ?
YOUR ANSWER : ?

Helium-mercury method is used for the measurement of the __________ of the catalyst.

Both B & C

Porosity

Surface area

Pore volume

TRUE ANSWER : ?
YOUR ANSWER : ?

Time required for 50% decomposition of a liquid in an isothermal batch reactor following first order kinetics is 2 minutes. The time required for 75% decomposition will be about __________ minutes.

6

4

3

8

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YOUR ANSWER : ?

When the reaction occurs in the diffusion controlled region, the apparent activation energy as measured is only __________ the true value.

Twice

Half

Equal

None of these

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YOUR ANSWER : ?

In a continuous flow stirred tank reactor, the composition of the exit stream

Is same as that in the reactor

Is different than that in the reactor

Depends upon the flow rate of inlet stream

None of these

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YOUR ANSWER : ?

For a __________ order reaction, the units of rate constant and rate of reaction are the same.

Second

First

Fractional

Zero

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YOUR ANSWER : ?

The space time is equivalent to the holding time in a steady state mixed reactor for

Non-isothermal gas reaction

Gas reactions with changing no. of moles

Constant fluid density systems

Variable fluid density systems

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YOUR ANSWER : ?

Half life period of a chemical reaction is proportional to CA0-1 , if the reaction is of __________ order.

Zero

First

Second

Third

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YOUR ANSWER : ?

For a tubular reactor with space time 'τ' and residence time 'θ', the following statement holds good.

τ = θ , when the fluid density changes in the reactor

τ = θ , for a non-isothermal reactor

τ = θ , for an isothermic tubular reactor in which the density of the process fluid is constant

τ and θ are always equal

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YOUR ANSWER : ?

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